Omaha Police officers responded to the Nebraska Medical Center to investigate a walk-in shooting around 3:45 pm Saturday. The victim, 23-year-old Nathaniel Campbell, told officers he was walking down Center Street between 44th and 50th when he heard a gunshot. The victim said he did not see anything, but then noticed he had been shot.

The victim told officers he then flagged down a vehicle to take him to the hospital. Officers didn't locate a scene in the area. Their investigation is ongoing.